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Analysis of white noise excited elasto-plastic oscillator of several degrees of freedom

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Keywords
  • Report Based On Ph.D.-Thesis (Supervisor: Ove Ditlevsen)
  • The Response Of The White Noise Excited Multi-Degree-Of-Freedom (Mdof) Oscillator Has Been Analyzed
  • Three Different Types Of Structural Systems Have Been Considered
  • The First Type Is A Shear-Wall Frame Having Elastic-Ideal Plastic Stiffness Properties Of The Column
  • The Second Type Is A Shear-Wall Frame Having Elastic-Ideal Plastic Stiffness Properties Of All Colum
  • While The Third Type Is A Single-Degree-Of-Freedom (Sdof) Oscillator Excited By Horizontal And Verti
  • The Basic Tool In The Analysis Is The Use Of The Slepian Model Process To Obtain The Plastic Displac
  • The Results Have Been Presented In Terms Of Density Functions For The Plastic Displacements And The
  • The Comparative Analysis Has Been Made For Varying Values Of The System Parameters And Has Shown Goo
  • The Slepian Model Has Been Used In Two Different Ways
  • Depending On The Expression Of The Plastic Displacement
  • By Using An Approximate Expression Of The Plastic Displacement Neglecting A Term Related To Energy C
  • The Use Of The Slepian Model Process Is Leading To Closed Form Solutions To The Density Functions Fo
  • When The Energy Related Term Is Taken Into Consideration A Simulation Procedure Based On The Slepian
  • From Which A Density Function Can Be Estimated
  • The Single Plastic Displacements Is Considered Separately Leading To Different Expressions Of The De
  • Depending On Whether The First Plastic Displacement In A Clump Of Plastic Displacements Or One Of Th
  • There Is A Good Agreement Between The Obtained Density Functions Determined On The Basis Of The Slep
  • Certain Features
  • Such As Inter-Clump Durations And The Time Distance Between Any Two Consecutive Crests In A Clump
  • Are Not Available From The Slepian Model Process And Are Estimated Solely From The Direct Simulation
  • Comparisons Of The Estimates Of These Parameters Are Done By Considering The Envelope Process Of The
  • The Results Show Good Agreements
  • Experiments Have Been Made For A Mdof-Oscillator Of The Same Type As Considered In The Numerical Ana
  • Comparison With Results Obtained From The Numerical Analysis Show Good Agreements
  • The Influence Of The Vertical Ground Acceleration On The Horizontal Displace Ment Process Is Examine
  • The Parametric Excitation Coming From The Vertical Ground Acceleration Is Included In The Direct Sim
  • And The Results Show That The Influence On The Displacement Is Almost Vanishing For The Considered L

Abstract

Analysis of white noise excited elasto-plastic oscillator of several degrees of freedom - DTU Orbit (21/03/14) Randrup-Thomsen S 1997. Analysis of white noise excited elasto-plastic oscillator of several degrees of freedom: Report based on Ph.D.-thesis (supervisor: Ove Ditlevsen). 118 p.

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